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King Size Mattresses

King size mattresses measure 150cm x 200cm (5ft x 6ft 6) and offer slightly more space to enjoy your sleep, whether you prefer the feel of pocket springs, memory foam or many other mattress types. We have a range of great deals including up to 60% off across quality brands, and free delivery for all our comfortable mattresses.

Our Top Picks

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  1. Sleepsnug Economy Mattress

    Sleepsnug

    Now From: £109.00

    Next Day Delivery

    The Sleepsnug Economy Mattress is an affordable open coil mattress which measures 15cm deep. The Economy features a 13.5 gauge spring system and a quilted top. For occasional use.

  2. Sleepsnug Twilight Mattress

    Sleepsnug

    Now From: £119.00

    Next Day Delivery

    The Sleepsnug Twilight Mattress is an open coil mattress which has a 13.5 gauge spring system offering a soft to medium feel. Turnable and with a quilted cover, this is a good budget mattress.

  3. CLEARANCE - Visco Sensations Luxury Memory Foam Mattress

    Visco Sensations

    Was: £259.98

    You Save: £129.99 (50%)

    Now Only: £129.99

    Delivered Within 2 Days

    The Visco Sensations Luxury Memory Foam Mattress is an excellent budget memory foam mattress, allowing everyone to enjoy the fabulous benefits of this revolutionary material. The 25mm of memory foam on a reflex foam base provides pressure relief and support.

  4. Relyon Easy Support Mattress

    Relyon

    Was: £299.00

    You Save: £160.00 (53.5%)

    Now Only: £139.00

    Next Day Delivery

    The Relyon Easy Support mattress is great for people who want Relyon luxury but are on a budget. It's hypo-allergenic and anti dust mite properties will benefit people with allergies or asthma and it arrives rolled for easy lifting.

  5. Relyon Firm Support Mattress

    Relyon

    Was: £299.00

    You Save: £160.00 (53.5%)

    Now Only: £139.00

    Next Day Delivery

    The Relyon Firm Support mattress is an orthopaedic, 15cm hypo-allergenic foam mattress made from Relyon's own Superflex comfort foam. This budget mattress from a trusted brand is great for back support and allergy sufferers.

  6. Contoura Reflex Support Mattress

    Contoura

    Now From: £139.99

    Next Day Delivery

    The Contoura Reflex Support Mattress is 17cm in thickness and has the benefits of bouncy springs with a comfortable medium-feel reflex foam layer on top. A good option for those looking for a supportive mattress with the benefits of reflex foam on a budget.

  7. CLEARANCE - Sleepsnug Ortho Classic Mattress

    Sleepsnug

    Was: £410.00

    You Save: £261.00 (63.7%)

    Now Only: £149.00

    Next Day Delivery

    The Sleepsnug Ortho Classic Mattress is a medium to firm orthopaedic mattress, for those who prefer a firmer feel. Featuring a 12.5 gauge spring unit, this is great for those of above average stature looking for a bargain.

  8. SALE - Breasley Value Visco 250 Mattress - with Free Pillows

    Breasley

    Was: £520.00

    You Save: £370.01 (71.2%)

    Now Only: £149.99

    Next Day Delivery

    This mattress allows you to experience the benefits of memory foam without breaking the bank. A 25mm layer of memory foam is supported by a high resilience foam base, providing support and comfort in equal measures. It also allows for excellent air circulation keeping it fresher for longer. Comes with a free pillow in single and two in the larger sizes.

  9. Sleepsnug Almond Mattress

    Sleepsnug

    Was: £300.00

    You Save: £150.00 (50%)

    Now Only: £150.00

    Next Day Delivery

    The Sleepsnug Almond Mattress is an open coil mattress which combines comfort, support and durable construction, at an affordable price. This 19cm deep mattress has a 13.5 gauge spring system, featuring additional fillings and a deep quilted top, so you can relax into a sound night's sleep.

  10. Contoura Pocket Eco 1000 Mattress

    Contoura

    Now From: £159.99

    Next Day Delivery

    The entry-level Pocket Eco 1000 Mattress from Contoura brings you the benefit of pocket springs at an affordable price. This 17cm deep mattress comes with 1000 pocket springs, which are individually wrapped for greater support and comfort.

  11. Sleepsmart Memory Pedic 1500 Mattress

    Sleepsmart

    Now From: £159.99

    Next Day Delivery

    The Sleepsmart Memory Pedic 1500 Mattress consists of 25mm of comfortable memory foam and a highly resiliant foam base. At 15cm deep, this mattress has a medium to firm feel and will ensure you enjoy a sound night’s sleep without breaking the bank.

  12. Visco Sensations Comfort 1500 Mattress

    Visco Sensations

    Was: £399.00

    You Save: £239.01 (59.9%)

    Now Only: £159.99

    Next Day Delivery

    If you're looking for a mattress for a child or a teenager, then the Visco Sensations Comfort 1500 Mattress is an ideal choice. With a reflex foam base that is 15cm deep, this mattress offers excellent support features and anti-allergenic features that will help your son or daughter enjoy a restful sleep every night. The Visco Sensations Comfort 1500 also comes with a 5 year warranty so you can buy with confidence.

  13. Visco Sensations Memory Flex 1500

    Visco Sensations

    Was: £399.00

    You Save: £239.01 (59.9%)

    Now Only: £159.99

    Next Day Delivery

    The Visco Sensations Memory Flex 1500 is an excellent children's bunk or cabin bed mattress and is designed especially for kids, with a safer, thinner layer of memory foam which is 20mm deep and an overall depth of 15cm.

  14. Sleepsnug Backcare Mattress

    Sleepsnug

    Was: £390.00

    You Save: £230.00 (59%)

    Now Only: £160.00

    Next Day Delivery

    The Sleepsnug Backcare Mattress is an orthopaedic open coil mattress with a 12.5 gauge spring unit, which will provide you with back support so you can enjoy a better night's rest. With a medium to firm feel and measuring 20cm deep, this mattress is an ideal choice for anyone who regularly suffers from back pain. It also features tufting and vents, for a longer lasting mattress and countless restful, supported nights.

  15. Contoura Memory Backcare 250 Mattress

    Contoura

    Now From: £169.99

    Next Day Delivery

    Great value, this entry level mattress has all the benefits of firm memory foam mattress for those on a budget. The Contoura Memory Backcare 250 Mattress is a 16cm deep mattress with 20mm of memory foam above 14cms of reflex foam.

  16. Contoura Backcare 1500 Mattress

    Contoura

    Now From: £169.99

    Next Day Delivery

    The Contoura Backcare 1500 is a firm entry level reflex foam mattress and so offers orthopaedic support to help align your spine correctly with the added bonus of having no springs to maintain. Also hypoallergenic, it is a great investment for allergy sufferers.

  17. SALE - Myer’s Ortho Firm Mattress

    Myer's Beds

    Was: £620.00

    You Save: £440.01 (71%)

    Now Only: £179.99

    Next Day Delivery

    The Myer’s Ortho Firm Mattress is a great choice for individuals who require extra support from their mattress but want an affordable option. Featuring 650 open coil springs, this 25cm deep mattress offers both luxurious comfort, thanks to the damask cover and additional white fibre fillings, as well as excellent supportive benefits which last throughout the night. Enjoy a relaxing and rejuvenating night’s rest with this mattress, which also features tufting and rod edge support.

  18. SALE - Breasley Visco 250 Ortho Mattress - with Free Pillows

    Breasley

    Was: £610.00

    You Save: £430.01 (70.5%)

    Now Only: £179.99

    Next Day Delivery

    This is a 20cm deep mattress which has 25mm of memory foam to help relieve pressure and which serves to make this a sumptuously comfortable mattress. The high resilience foam base provides exceptional support and as with all Breasley mattresses it comes vacuum packed for ease of transport and installation.

  19. Contoura Memory Backcare 6000 Mattress

    Contoura

    Now From: £189.99

    Next Day Delivery

    The Contoura Memory Backcare 6000 is a firm 17cm deep mattress with 50mm of memory foam and 120mm of reflex foam to help provide utter comfort while you sleep. It reacts to your body heat in order to contour to your shape, taking pressure off your joints and keeping your spine aligned.

  20. Contoura Memory Pocket 1000 Mattress

    Contoura

    Now From: £189.99

    Next Day Delivery

    The Contoura Memory Pocket 1000 Mattress is a classic combination of pocket springs and memory foam, to provide you with tailored comfort and support throughout the night. Both the pocket springs and the memory foam work in harmony with specific areas of your body to provide optimum support and pressure relief. It is also great for allergy sufferers thanks to itsa hypo-allergenic properties.

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Most recent reviews in Kingsize (5ft)

  • Review for CLEARANCE - Sleepsnug Ortho Classic Mattress

    Good service, OK mattress

    I bought this to replace a foam mattress I found to be far to soft. While I wouldn't say this mattress is as firm as I'd like, it is definitely firmer and I have slept better. I think there is a difference between a firm mattress and firm springs. There isn't a lot of cushioning on the top of the mattress and I would pay more for a mattress with more fillings if I was planning to keep it for a long time.

    posted by G. Bailey (04/04/2014)

    Quality
    Price
    Comfort
  • Review for Sleepsnug Twilight Mattress

    Cheap

    The only benefit of this mattress is that it's cheap. Fine for a guest room or in an emergency but I would not sleep on it every night.

    posted by Aparna (04/04/2014)

    Quality
    Price
    Comfort
  • Review for Sleepsnug Refresh 1500 Mattress

    Very Comfortable

    I find this mattress nice and firm at first, with a firm supportive base. As the foam warms a little it becomes softer to give just enough give to relieve pressure without becoming a soft mattress.

    posted by Rajeev (19/03/2014)

    Price
    Comfort
    Quality

More on King Size

King size mattresses are becoming more and more popular on the market today and also more and more affordable. This mattress size larger than a traditional double mattress allows couples to share extra sleeping space for optimum comfort and is now produced by most of the manufacturers.

 

When choosing a new mattress, bear in mind that mattress sizes in the UK remain the same whichever manufacturer makes the mattress. This is sometimes not the case for divans and besteads. The industry standard for a king size mattress is 150cm x 200cm, which is 5’. European and North American sizes for kingsize can differ so be aware of this if you have imported your bed.

 

While mattress sizes are standardised in the UK bed industry, the depth of a king size mattress will depend on the structure and the fillings within the mattress. In most cases manufacturers use combinations of different fillings to offer different support and comfort levels on the various sleeping parts of the mattress.

 

Airsprung, Relyon, Joseph International or Healthbeds - whichever brand you choose, nearly all their mattresses will be available in a 5ft and you can choose from a variety of comfort levels, firmnesses, fillings, finishes and types. Including pocket sprung, memory foam and latex.